home: basic i3 setup

home/default.nix

@@ -1,5 +1,9 @@
 { ... }:
 {
+  imports = [
+    ./x
+  ];
+
   home.stateVersion = "20.09";
 
   home.username = "alarsyo";

home/x/default.nix

@@ -0,0 +1,10 @@
+{ config, lib, pkgs, ... }:
+{
+  imports = [
+    ./i3.nix
+  ];
+
+  options.my.home.x = with lib; {
+    enable = mkEnableOption "X server configuration";
+  };
+}

home/x/i3.nix

@@ -0,0 +1,77 @@
+{ config, lib, pkgs, ... }:
+let
+  isEnabled = config.my.home.x.enable;
+
+  myTerminal =
+    # FIXME: fix when terminal is setup in home
+    # if config.my.home.terminal.program != null
+    if true
+    then "alacritty"
+    else "i3-sensible-terminal";
+
+  alt = "Mod1"; # `Alt` key
+  modifier = "Mod4"; # `Super` key
+
+  logoutMode = "[L]ogout, [S]uspend, [P]oweroff, [R]eboot";
+in
+{
+  config = lib.mkIf isEnabled {
+    # FIXME: enable flameshot when added
+    # my.home = {};
+
+    xsession.windowManager.i3 = {
+      enable = true;
+
+      config = {
+        inherit modifier;
+
+        bars =
+          [
+            {
+              statusCommand = "i3status";
+              position = "top";
+            }
+          ];
+
+        focus = {
+          followMouse = true;
+          mouseWarping = true;
+        };
+
+        fonts = [
+          "DejaVu Sans Mono 8"
+        ];
+
+        keybindings = lib.mkOptionDefault {
+          "${modifier}+Shift+e" = ''mode "${logoutMode}"'';
+        };
+
+        modes =
+          let
+            makeModeBindings = attrs: attrs // {
+              "Escape" = "mode default";
+              "Return" = "mode default";
+            };
+          in
+          {
+            "${logoutMode}" = makeModeBindings {
+              "l" = "exec --no-startup-id i3-msg exit, mode default";
+              "s" = "exec --no-startup-id systemctl suspend, mode default";
+              "p" = "exec --no-startup-id systemctl poweroff, mode default";
+              "r" = "exec --no-startup-id systemctl reboot, mode default";
+            };
+          };
+
+        startup = [
+          # FIXME: make it conditional on "nvidia" being part of video drivers
+          {
+            command = "nvidia-settings -a '[gpu:0]/GPUPowerMizerMode=1'";
+            notification = false;
+          }
+        ];
+
+        terminal = myTerminal;
+      };
+    };
+  };
+}

hosts/boreal/default.nix

@@ -10,6 +10,8 @@ in
   imports =
     [ # Include the results of the hardware scan.
       ./hardware-configuration.nix
+
+      ./home.nix
     ];
 
   # Use the systemd-boot EFI boot loader.

hosts/boreal/home.nix

@@ -0,0 +1,7 @@
+{ ... }:
+{
+  home-manager.users.alarsyo = {
+    # Keyboard settings & i3 settings
+    my.home.x.enable = true;
+  };
+}